package com.bjpowernode.singleton;

/**
 * @ClassName Singleton03
 *
 * @Author Cat
 */
public final class Singleton03 {

    private static Singleton03 instance = null;

    private Singleton03() {

    }

    public static synchronized Singleton03 getInstance() {
        if (null == instance) {
            instance = new Singleton03();
        }
        return instance;
    }
}